Investments (Tables)

9 Months Ended

Sep. 26, 2020

Investments and Cash [Abstract]

Schedule of Available-for-sale Securities Reconciliation [Table Text Block]

	Sep 26, 2020								Dec 28, 2019
(In Millions)	Adjusted Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value		Adjusted Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Corporate debt	$	2,077	$	92	$	—	$	2,169	$	2,914	$	44	$	—	$	2,958
Financial institution instruments	3,431		20		—		3,451		3,007		15		(1)		3,021
Government debt	1,604		12		—		1,616		560		4		—		564
Total available-for-sale      debt investments	$	7,112	$	124	$	—	$	7,236	$	6,481	$	63	$	(1)	$	6,543

Investments Classified by Contractual Maturity Date [Table Text Block]

The fair value of available-for-sale debt investments, by contractual maturity, as of September 26, 2020, was as follows:

(In Millions)	Fair Value
Due in 1 year or less	$	3,504
Due in 1–2 years	1,450
Due in 2–5 years	1,270
Due after 5 years	—
Instruments not due at a single maturity date	1,012
Total	$	7,236

Investment [Table Text Block]

(In Millions)	Sep 26, 2020		Dec 28, 2019
Marketable equity securities	$	481	$	450
Non-marketable equity securities	3,189		3,480
Equity method investments	9		37
Total	$	3,679	$	3,967

Gain (Loss) on Securities [Table Text Block]

The components of gains (losses) on equity investments, net for each period were as follows:

	Three Months Ended				Nine Months Ended
(In Millions)	Sep 26, 2020		Sep 28, 2019		Sep 26, 2020		Sep 28, 2019
Ongoing mark-to-market adjustments on marketable equity      securities	$	(146)	$	114	$	(84)	$	188
Observable price adjustments on non-marketable equity securities	5		84		142		100
Impairment charges	(40)		(17)		(233)		(79)
Sale of equity investments and other¹	237		137		387		713
Total gains (losses) on equity investments, net	$	56	$	318	$	212	$	922

¹ Sale of equity investments and other includes realized gains (losses) on sales of non-marketable equity investments, our share of equity method investee gains (losses) and distributions, and initial fair value adjustments recorded upon a security becoming marketable.

Gains and losses for our marketable and non-marketable equity securities during the period were as follows:

	Three Months Ended				Nine Months Ended
(In Millions)	Sep 26, 2020		Sep 28, 2019		Sep 26, 2020		Sep 28, 2019
Net gains (losses) recognized during the period on equity securities	$	19	$	281	$	102	$	366
Less: Net (gains) losses recognized during the period on equity      securities sold during the period	(12)		(54)		(87)		(321)
Unrealized gains (losses) recognized during the reporting      period on equity securities still held at the reporting date	$	7	$	227	$	15	$	45